GNC 420 and GPS 400
GNC 420, GPS/COMM with color moving map
The GNC 420 and GPS 400 are impressive additions to
the line up of WAAS upgradeable panel mount avionics from
Garmin. As logical derivatives of the revolutionary GNS 430,
the GNC 420 and GPS 400 deliver the precision, reliability
and design integrity you’ve come to expect from Garmin.
Both units feature easy-to-use and easy-to-read,
user-configurable displays that simplify access to massive
amounts of pilot-specific data. You can monitor your flight
plan by watching onscreen text and graphics. And you
can experience the finest in situational awareness from
the color moving map with Jeppesen® flight data overlaid
on a detailed built-in sectional-like basemap that shows
cities, highways, railroads, rivers, lakes and coastlines.
The 400-series avionics also include FDE (Fault Detection
GPS 400 GPS with color moving map
and Exclusion) software, a requirement for Oceanic
Approval. The "A" version of the GNC 420 offers the power
and performance of a 16-watt comm.
Whether you need a full-featured GPS with color moving
map or a GPS/comm with color moving map to round out
your panel, look to Garmin for a perfect fit.
GNC 420 and GPS 400 common specifications
Jeppesen database
Coverage:
Americas, international or worldwide
Airports:
Identifier, city/state, country, facility
name, lat/long, elevation, fuel service,
control, approach information
VORs:
Identifier, city/state, country, facility name,
lat/long, frequency, co-located DME/TACAN,
magnetic variation, weather broadcast
NDBs:
Identifier, city/state, country, facility name,
lat/long, frequency, weather broadcast
Intersections:
Identifier, country, lat/long, nearest VOR
Frequencies:
Approach, arrival, control area, departure,
Class B, Class C, TMA, TRSA—with sector,
altitude and text usage info; also, ASOS, ATIS,
AWOS, center, clearance delivery, ground,
pre-taxi, tower, unicom, localizer and ILS
Runways:
Designation, length, width, surface,
lighting, pilot-controlled lighting freq.
FSS:
Identifier, reference VOR, freq. usage
ARTCC:
Identifier, freq. usage
MSA:
Minimum safe altitude along and
in proximity to active flight plan
Approaches:
Non-precision and precision approaches
throughout the database coverage
SIDs/STARs:
Airspaces:
Contains all SIDs and STARs
Class B and C with sectors, International CTA
and TMA with sectors; all special-use airspace,
including MOA’s, prohibited and restricted
areas—with controlling agency and airport
Safety features
Emergency search: 9 nearest airports, VORs, NDBs, intersections, or
user waypoints; 5 nearest FSS and ARTCC freq.
Alarms:
Arrival; timers; airspace alarms at
10 minutes, 2nm and inside airspace
User customization
Waypoints:
1000 user-defined
Flight plans:
20 reversible; up to 31 waypoints each
GPS performance
Receiver:
PhaseTrac12,™ twelve parallel channel
receiver, simultaneously tracks and uses
up to 12 satellites
Acquisition time: 12 seconds (warm), 45 seconds (cold)
Update rate:
Once per second, continuous
Accuracy:
Position—15 meters (49 feet) RMS*
Velocity—0.1 knot RMS steady state
GNC 420 and GPS 400
GNC 420 and GPS 400 common specifications
Dynamics:
Velocity (max)—999 knots
Acceleration (max)—6 g
Nav features:
Pilot-defined course selection and waypoint
hold, closest point of approach, departure
and arrival frequencies, approach navigation
using published approach procedures stored
on NavData card, terminal navigation using
SIDs/STARs from NavData card
Planning features: True airspeed, density altitude, winds aloft,
RAIM availability, sunrise/sunset times, trip
and fuel planning, vertical navigation (VNAV)
Interfaces:
ARINC 429, Aviation RS-232, CDI/HSI, RMI
(digital: clock/data); superflag out, altitude
(serial: Icarus, Shadin-Rosetta, encoded
Gillham/Greycode), fuel sensor, fuel/air
data, BFG WX 500 StormScope,™ BFG SKY 497
SkyWatch™ and Ryan 9900B TCAD
Map datums:
124, plus one user-defined
Frequency display: Upper left corner of active matrix LCD,
2-lines with active frequency above standby
NAVCOM page
Default NAV page
Physical specifications
Unit size:
Width = 6.25"
Height = 2.65"
Depth = 11.00" behind panel, with connectors
Unit weight:
4.9 pounds installed (400)
5.8 pounds installed (420)
Display:
Color LCD
Power:
11-33 VDC; 28 VDC (420"A")
Data storage:
Separate internal battery protects stored
data for up to five years
Environmental
Temperature:
Humidity:
Altitude range:
Runway diagram page
–20°C to +55°C (operating range)
–20°C to +70°C (short-term operation)
95% non-condensing
–1,500 ft to 50,000 ft
©2003 Garmin Ltd. or its subsidiaries
Components
Standard package: GNC 420 or GPS 400 and a NavData™ card
GPS antenna
Installation rack and connectors
Pilot’s guide
Quick reference guide
Database subscription packet
Options:
User data card
Certifications
GPS:
Oceanic Approval:
Garmin International, Inc.
1200 East 151st Street
Olathe, Kansas 66062, U.S.A.
913/397.8200 fax 913/397.8282
TSO C129a, Class A1 (en route, terminal and approach)
Fault Detection and Exclusion (FDE)
GNC 420 unique specifications
VHF COM performance
Frequency display: Upper left corner of active matrix LCD,
2-lines with active frequency above standby
Channels:
760 (25 kHz spacing); configuration for 3040
channels (8.33 kHz spacing) also provided
Frequency range: 118.000 MHz to 136.975 MHz
Transmit power: 10 watts minimum; 16 watts minimum (420"A")
Modulation:
70%
Receive sensitivity: 2.0 µV for 6 dB S/N with 1 kHz 30% mod.
REV0403
Squelch sensitivity: 2.0 µV typical
Audio output:
100 mW minimum into a 500 ohm load;
external amplifier required to drive
cockpit speaker
Additional certifications
VHF COM:
TSO C37d, Class 4 and 6 (transmit),
TSO C37d, Class 3 and 5 (transmit)- 420"A"
and TSO C38d, Class C and E (receive)
M02-10044-00
Garmin (Europe) Ltd.
Unit 5, The Quadrangle,
Abbey Park Industrial Estate,
Romsey, SO51 9DL, U.K.
44/1794.519944 fax 44/1794.519222
Garmin Corporation
No. 68, Jangshu 2nd Rd.
Shijr, Taipei County, Taiwan
886/2.2642.9199 fax 886/2.2642.9099
www.garmin.com
Specifications are subject to change without notice.